Answer this question truthfully
### Question: What causes Coronary vasospasm?
### Response: The spasm often occurs in coronary arteries that have not become hardened due to plaque buildup (atherosclerosis). However, it also can occur in arteries with plaque buildup.
A contraction (squeezing) of muscles in the artery wall causes these spasms in the arteries. The contraction occurs in just one area of the artery. The coronary artery may appear normal during angiography, but it does not function normally.